Physics Technology Update (4th Edition)

Published by Pearson
ISBN 10: 0-32190-308-0
ISBN 13: 978-0-32190-308-2

Chapter 29 - Relativity - Problems and Conceptual Exercises - Page 1040: 3

Answer

(a) Proper time (b) Proper time (c) Proper time (d) Dilated time

Work Step by Step

Dilated time is only observed when the observer is moving. In cases (a), (b), and (c), the observers are stationary, so they are measuring proper time. The observer in the moving car may not have time dilated much, but their time will be dilated.
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